stray start barline if add start barline after linebreak after double barline and then remove and readd the linebreak

In 2.0.3 3c7a69d and 2.1-dev 3d0347f:

1. put a linebreak end of meas 1.
2. drop double barline on meas 1.
3. drop start repeat on meas 2.
4. remove the linebreak.
5. reapply the linebreak.

Observe that there is a stray start repeat barline at the end of measure with the line break:

Note I can't make this bug happen in 3.0 c231be2 because placing the start barline at the beginning of the measure after the linebreak will remove the double barline at the end of the measure before the linebreak. But actually I would prefer that adding the start repeat should not remove the double barline, because the double barline has a meaning that gets lost when removed. I believe that a barline should be able to be both a double barline and a start repeat barline, just displayed different dep

I'm sure this issue has been reported before...I've known about it for a while...but I don't know how to search for it.

Can also produce by:

1. add different time sig to second measure
2. add line break to end of first measure
3. apply start repeat to second measure
4. remove time signature

In that case, the start barline will appear at the end of the first line, while there won't be a start barline at the beginning of the second line:

Note that happens on 2.0.3 and 2.1, but not on 3.0, since there is some other bug with 3.0 where the start repeat is completely removed after deleting the timesig.